Accession Number : ADA296022

Title :   Surface Characterization of Cu-ion Implanted Single Crystal and Thin Film ZnO for Catalytic Applications.

Descriptive Note : Summary rept. 6 Sep 92-3 Sep 93,

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Brodkin, J. S. ; Chadwick, D.

PDF Url : ADA296022

Report Date : MAY 1995

Pagination or Media Count : 31

Abstract : Single crystals and thin films of zinc oxide were implanted with copper ions in order to study the catalytic properties of a mixed Cu-ZnO system. ZnO is widely used as a catalyst in the methanol synthesis reaction, and copper has been noted to have a synergistic effect on the rates and yields of reaction. The samples were characterized by x-ray photoelectron spectroscopy (XPS) before and after implantation, and surface copper concentration in the implanted specimens was determined. Implanted samples were heated under oxidizing and reducing atmospheres and re-examined by XPS to determine the oxidation state of the implanted copper species. XPS results demonstrated that the oxidation state of the copper could be manipulated, although there was a corresponding decrease in the concentration of the surface copper ions, relative to temperature and time of heating. jg p.3

Descriptors :   *IONS, *THIN FILMS, *SINGLE CRYSTALS, *SURFACES, *COPPER, *ZINC OXIDES, *CATALYSIS, *IMPLANTATION, TEMPERATURE, SYNTHESIS, REDUCTION, TIME, OXIDATION, X RAY PHOTOELECTRON SPECTROSCOPY, RESPONSE, METHANOLS, HEATING, SAMPLING, YIELD, CONCENTRATION(COMPOSITION), CATALYSTS, SYNERGISM.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Crystallography
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE